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Finding the Fourth Proportional to 668,454.89, 922,585.66 and 396,672.64

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Solution

The fourth proportional to 668,454.89, 922,585.66 and 396,672.64 is: 547,478.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,454.89 : 922,585.66 = 396,672.64 : x
  2. Step 2: Convert to fraction form
    668,454.89/922,585.66 = 396,672.64/x
  3. Step 3: Cross multiply
    668,454.89x = 922,585.66 × 396,672.64
  4. Step 4: Simplify right side
    668,454.89x = 365,964,484,734.22
  5. Step 5: Solve for x
    x = 365,964,484,734.22/668,454.89
  6. Step 6: Final answer
    x = 547,478.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.